Home / 209,420.92-311,762.78-208,175.36

Finding the Fourth Proportional to 209,420.92, 311,762.78 and 208,175.36

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Solution

The fourth proportional to 209,420.92, 311,762.78 and 208,175.36 is: 309,908.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,420.92 : 311,762.78 = 208,175.36 : x
  2. Step 2: Convert to fraction form
    209,420.92/311,762.78 = 208,175.36/x
  3. Step 3: Cross multiply
    209,420.92x = 311,762.78 × 208,175.36
  4. Step 4: Simplify right side
    209,420.92x = 64,901,328,699.63
  5. Step 5: Solve for x
    x = 64,901,328,699.63/209,420.92
  6. Step 6: Final answer
    x = 309,908.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.